Smoke consuming furnace



No. 617,533. Patented Jan. 1 ,1899."

w. LUTZY SMOKE GONSUMING FURNAlFE.

.(Applicafion me oc. 14, 1597.

(No Model.)

m: Ncnms PETERS no. murauru UNITED STATES ATENT OFFICE.

\VILHELM LUTZ, OF NUREMBERG, GERMANY, ASSIGNOR TO THE ACTIEN-GESELLSOIIAFT FUER PATENT VERWERTHUNG, OF SAME PLACE.

SMOKE-CONSUMING FURNACE.

SPECIFICATION forming part of Letters Patent No. 617,533, dated January10, 1899.

Application filed October 14,1897. SerialNo. 655,228. (No model.)

T0 (11 whom it may concern.-

Be it known that I, WILHELM LUTz, engineer, a subject of the GermanEmperor, residing at Nuremberg,in the Kingdom of Bavaria, Germany, haveinvented certain new and useful Improvements in Smoke-ConsumingFurnaces, of which the following is a full, clear, and exactdescription.

The smoke-consuming furnace protected by Patent No. 554,070, datedFebruary 4, 1896, is so built that a number of nozzles opposite a fullground-plate for carrying the fuel will convey air upon the upperburning layers.

The object of the present invention is an extended employment of suchnozzles in shaftfurnaces. The construction of such a furnace isillustrated by Figure 1 of the inclosed sketch,showing thecross-section. Around the shaft a there is an arrangement of vertical orslightly-slanting air-channels c, which are open at the bottom andcommunicate with the ash-box O. From them the nozzles d receive theirair, which is spread over the upper burning layers, and in this way acomplete combustion is brought about. With this arrangement the surfaceof the fire is very considerable in proportion to the fire-box, andconsequently to the quantity of the fuel contained in it, so that anintensive combustion must take place. It is an essential advantage ofthe arrangement of the air-channels and the nozzles that by a strongband they form one piece, which can be easily taken out when it requiresmending.

In larger furnaces, where the nozzles cl stretch across the ground-plateand where channels in the side walls serve for introducing the air, asimpler method may be used,

' which has the advantage of diminishing repa- This innovation is shownby the in- Fig. 2

rations. closed sketches in two executions.

shows all the nozzles combined into one. This is formed by a hollowvaultor a ceiling 6, with an inclosed arch f, so that a large nozzle isproduced with the mouth g. The introduction of air is brought about bycarrying the airheated air on the surface of the fire from open ings Z.The latter are protected by strong arches m and n in due distance. Overthe three arches i, m, and n lies a ceiling 0. The last arrangementoffers the advantages that the air-openings cannot be stopped up bycinders, that the air is equally distributed over the whole fire, andthat a way is made both upward and downward for the fire-gases to burstinto flames.

Having thus fully described my invention, what I claim, and desire tosecure by Letters Patent, is-

1. In a smoke-consuming furnace, a ceiling or vault for the fire-boxcomposed of one or more parallel hollow arches havingair-passagestherethrough one or more solid arches and side drafts communicating withthe interior of said hollow arches, substantially as described.

2. In a smoke-consuming furnace, a ceiling or vault for the fire-box,composed of one or more parallel hollow arches having air-passagestherethrough and air-passages therebetween and drafts communicating withsaid air-passages, and one or more solid arches, substantially asdescribed.

In testimony whereof I affix my signature in presence of two witnesses.

WILHELM LUTZ.

Vitnesses:

ALEX. WIELE, MAX SoHoIme.

